Remediation of PAHs, NSO-Heterocycles, and Related Aromatic Compounds in Permeable Reactive Barriers Using Activated Carbon - Permeable Reactive Barrier: Sustainable Groundwater Remediation - page 224

TABLE 11.1
Descriptions of the Two Reactive Barriers in Austria and Germany Investigated
in This Study

Reactive Barrier

Brunn am Gebirge
(Austria) Parameter Karlsruhe (Germany)

Constructed 2000/2001 1999

barrier type Full-scale, GAC (granulated activated

carbon)

Full-scale, GAC

Concentration sum
of the contaminants

About 2000 μg/L About 8000 μg/L

Length of barrier 240 m 220 m

# of gates (reactors) 8 4

Dimension reactors Diameter 1.8 m, height 15-18 m

(volume for AC filling 21-27 m 3 )

Diameter 2 m, height 6-8 m

AC used GAC TL830 (Chemviron) for gates 1, 2,

7, and 8 and D 43/1 (CarboTech) for
gates 3, 4, 5, and 6

CC 15 (Donau Carbon) for
all four gates

Sum mass AC About 100 tonnes About 20-24 tonnes

Water flow 9-10 L/s (mean, total flow through the

whole system) variable flow through
individual gates 1-8:1.0-1.4 L/s

0.5-2 L/s (total flow
through the whole system)

TABLE 11.2
Field Campaigns Performed at the Reactive Barriers in Austria (Brunn am Gebirge)
and Germany (Karlsruhe)

#
Samples

#
Samples Reactive Barrier Field Campaigns 1 + 2 Field Campaigns 3 + 4

Brunn am Gebirge November 17-19, 2007 17 July 10-14, 2008 13

Karlsruhe July 24-26, 2007 17 September 14-16, 2009 21

11.3 Results
11.3.1 Extraction and Analysis of Organic Compounds

The accuracy of the analysis applied was demonstrated for a dense non-
aqueous phase liquid (DNAPL) tar oil from the bottom of well 12Q at the
contaminated site “Zeche Viktoria” in Lünen, Germany. A completely dis-
solved sample in dichloromethane was diluted with toluene and analyzed
by GC-MS. The mass calculated from all of the concentrations analyzed in
the sample yielded up to 98.7% of the mass of the tar oil (see Figure 11.4a).
Hence, the spectrum of compounds analyzed covered almost all of the main